ABS Warning Light Remains ON [08/2015 - ]: Procedure

1. Check if a CAN communication system DTC is output. Refer to DIAGNOSIS SYSTEM [08/2015 - ] .

   Result

   Result	Proceed to
   DTC is not output.	A
   DTC is output.	B

B → See step   8 

A: Go to next step 

1. Check if the skid control ECU connector is securely connected.

   OK

   The connector is securely connected.

NG → CONNECT CONNECTOR TO ECU CORRECTLY 

OK: Go to next step 

1. Check the battery voltage.

   Standard Voltage

   11 to 14 V

   Result

   Result	Proceed to
   OK	A
   NG (for 2GR-FE)	B
   NG (for 2AR-FE)	C

B → See step   9 

C → See step   11 

A: Go to next step 

1. Disconnect the skid control ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A49-25 (+BS) - Body ground*1 A94-25 (+BS) - Body ground*2	Always	11 to 14 V
   A49-25 (+BS) - A49-38 (GND1)*1 A94-25 (+BS) - A94-38 (GND1)*2	Always	11 to 14 V
   A49-28 (IG1) - Body ground*1 A94-28 (IG1) - Body ground*2	Ignition switch ON	11 to 14 V
   A49-28 (IG1) - A49-38 (GND1)*1 A94-28 (IG1) - A94-38 (GND1)*2	Ignition switch ON	11 to 14 V

   *1: for 2AR-FE (w/o Dynamic Radar Cruise Control System)

   *2: for 2AR-FE (w/ Dynamic Radar Cruise Control System), 2GR-FE

   TEXT IN ILLUSTRATION
   
   

   *A	for 2AR-FE (w/o Dynamic Radar Cruise Control System)
   *B	for 2AR-FE (w/ Dynamic Radar Cruise Control System), 2GR-FE
   *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

OK: Go to next step 

1. Turn the ignition switch off.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A49-38 (GND1) - Body ground*1 A94-38 (GND1) - Body ground*2	Always	Below 1 Ω

   *1: for 2AR-FE (w/o Dynamic Radar Cruise Control System)

   *2: for 2AR-FE (w/ Dynamic Radar Cruise Control System), 2GR-FE

   TEXT IN ILLUSTRATION
   
   

   *A	for 2AR-FE (w/o Dynamic Radar Cruise Control System)
   *B	for 2AR-FE (w/ Dynamic Radar Cruise Control System), 2GR-FE
   *a	Front view of wire harness connector (to Skid Control ECU (Brake Actuator Assembly))

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT) 

OK: Go to next step 

1. Reconnect the skid control ECU connector.
2. Perform an Active Test of the combination meter assembly (meter CPU) using the Techstream. Refer to DATA LIST / ACTIVE TEST [08/2015 - ] .
3. Check the combination meter assembly.

   OK

   The ABS warning light turns on or off in accordance with the Active Test operation.

   HINT: 

   If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing parts. Refer to PROBLEM SYMPTOMS TABLE [08/2015 - ] .

NG → See step   10 

OK → See step   7